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سٹینلیس سٹیل کیا ہے؟ 304ایل (US 30403)1.4307?
This V2A steel is comparable to AISI (1.4301), but differs from it in that it has a lower carbon content. The stainless steel 1.4307 has good corrosion resistance (PREN value 17.5 to 21.1) and is also resistant to intergranular corrosion in the welded state. It is not resistant to seawater or media containing salt or chlorine. سٹینلیس سٹیل 1.4307 has medium mechanical properties, a tensile strength of 500 to 700 N/mm², a hardness of ≤ 215 HB and a density of 7.9 kg/dm³ (at 20°C). Stainless steel AISI 304L (1.4307 / X2CrNi18-9) is non-magnetic and only slightly magnetisable (μr ≤ 1.3). It is easy to polish and has medium machinability. The material is suitable for machining and cold forming (cold massive forming and cold stamping).
Grades of Stainless Steel 1.4307
Chinese standard GB-T standard: grade S30403, new grade 022Cr19Ni10, old grade 00Cr19Ni10.
American Standard: ASME Standard: S30403, ASTM Standard: 304ایل, UNS Standard: 304ایل.
Japanese JIS standard: SUS 304L.
German standard DIN standard: “1.4306, 1.4307”.
European standard EN standard: “X2CrNi18-9, X2CrNi19-11”.
The standard NF standard: z2cn18-09.
British BS standard: 304S31, 304s12.
ایسایس 1.4307 کیمیائی ساخت(%)
| 304ایل (1.4307) کیمیائی ساخت | |||||||
| گریڈ | سی | Mn | پی | ایس | اور | کروڑ | میں |
| 304ایل (1.4307) | %0.03 زیادہ سے زیادہ | %2.0 زیادہ سے زیادہ | %0.045 زیادہ سے زیادہ | %0.03 زیادہ سے زیادہ | %0.75 زیادہ سے زیادہ | %18-20 | %8-10 |
مکینیکل پراپرٹیز
| Description | Type 304L |
| Proof Stress 0.2% (ایم پی اے) | 170 |
| Tensile strength (ایم پی اے) | 485 |
| Elongation A5 (%) | 40 |
| سختی | ایچ بی: 201 HRB: 92 |
فزیکل پراپرٹیز
Benefits of using 304L Stainless Steel
- Can be used in highly corrosive environments
- Low carbon content removes carbon precipitation in the welding process
- Weld annealing only needed in high stress applications
- Extremely similar to Type 304
Supplied Forms
چادر;پٹی;ٹیوب;بار;متعلقہ اشیاء & Flanges;پائپ;پلیٹ;کنڈلی.
سنکنرن مزاحمت
The formation of chromium carbides is excluded because of the low carbon content. Resistance to intergranular corrosion is given. In the absence of salt and chlorine concentrations, good corrosion resistance is present in natural environmental media.
Forging
Stainless steel AISI 304L (1.4307 / X2CrNi18-9) has good forging properties and is suitable for open-die and drop forging. The material must first be heated to a temperature of 1150°C to 1180°C. Forging can then be carried out in the temperature range between 950°C and 1180°C. The material must then be rapidly cooled in air or water.
گرمی کا علاج
- hardness HBW ≤: solid solution 187, hardness HRB ≤: 90,
- heating temperature: 1010 ~ 1150,
- heating method: fast cooling,
- other: cold-rolled plate solid solution 485, 201HBW 92HRB 210HV.
Cold Forming
AISI 304L can be used for cold forming and also for cold massive forming (according to DIN 10263-5). Cold heading is also possible with this material.
Hot Forming
Hot forming (cooling by air): 1200-900 °C
ویلڈنگ
Stainless steel AISI 304L (1.4307 / X2CrNi18-9) has excellent weldability. The material can be processed using most common welding methods such as arc welding or TIG welding. تاہم, this stainless steel grade is only suitable to a limited extent for gas fusion welding and submerged arc welding. A welding filler material is not required, but the material AISI 308L (1.4316) can be used as a filler. Resistance to intergranular corrosion is not affected by welding.
Applications of Stainless Steel 304L
- Chemical and petrochemical industry
- Process industry: pressure vessels, tanks, heat exchangers, piping systems, flanges, fittings, valves, and pumps
- Food industry
- Medical industry
- Mining
- Oil refining
- Pharmaceutical industry
- Nuclear industry
- Waste and paper industry